mirror of https://github.com/TakeV-Lambda/dino.git
78 lines
2.6 KiB
Vala
78 lines
2.6 KiB
Vala
using Gdk;
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using Gee;
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using Gtk;
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using Dino.Entities;
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namespace Dino.Ui {
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public class EditHistory {
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private Conversation? conversation;
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private TextView text_input;
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private HashMap<Conversation, Gee.List<string>> histories = new HashMap<Conversation, Gee.List<string>>(Conversation.hash_func, Conversation.equals_func);
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private HashMap<Conversation, int> indices = new HashMap<Conversation, int>(Conversation.hash_func, Conversation.equals_func);
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public EditHistory(TextView text_input) {
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this.text_input = text_input;
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text_input.key_press_event.connect(on_text_input_key_press);
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text_input.cut_clipboard.connect_after(save_state);
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text_input.paste_clipboard.connect_after(save_state);
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text_input.move_cursor.connect_after(save_state);
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text_input.button_release_event.connect_after(() => { save_state(); return false; });
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}
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public void initialize_for_conversation(Conversation conversation) {
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this.conversation = conversation;
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if (!histories.has_key(conversation)) {
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reset_history();
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}
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}
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public bool on_text_input_key_press(EventKey event) {
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bool ctrl_pressed = (event.state & ModifierType.CONTROL_MASK) > 0;
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if (ctrl_pressed && event.keyval == Key.z) {
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undo();
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} else if (ctrl_pressed && (event.keyval in new uint[]{ Key.Z, Key.y } )) {
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redo();
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} else if (event.keyval in new uint[]{ Key.space, Key.Tab, Key.ISO_Left_Tab }) {
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save_state();
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}
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return false;
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}
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private void undo() {
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save_state();
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if (indices[conversation] > 0) {
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indices[conversation] = indices[conversation] - 1;
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text_input.buffer.text = histories[conversation][indices[conversation]];
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}
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}
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private void redo() {
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if (indices[conversation] < histories[conversation].size - 1) {
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indices[conversation] = indices[conversation] + 1;
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text_input.buffer.text = histories[conversation][indices[conversation]];
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}
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}
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private void save_state() {
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if (histories[conversation][indices[conversation]] == text_input.buffer.text) return;
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if (indices[conversation] < histories[conversation].size - 1) {
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histories[conversation] = histories[conversation].slice(0, indices[conversation] + 1);
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}
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histories[conversation].add(text_input.buffer.text);
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indices[conversation] = indices[conversation] + 1;
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}
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public void reset_history() {
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histories[conversation] = new ArrayList<string>();
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histories[conversation].add("");
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indices[conversation] = 0;
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}
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}
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}
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